grid.circle               package:grid               R Documentation

_D_r_a_w _a _C_i_r_c_l_e

_D_e_s_c_r_i_p_t_i_o_n:

     This function draws a circle.

_U_s_a_g_e:

     grid.circle(x=0.5, y=0.5, r=0.5, default.units="npc",
                 gp=gpar(), draw=TRUE, vp=NULL)

_A_r_g_u_m_e_n_t_s:

       x: A numeric vector or unit object specifying x-locations.

       y: A numeric vector or unit object specifying y-locations.

       r: A numeric vector or unit object specifying radii.

default.units: A string indicating the default units to use if 'x',
          'y', 'width', or 'height' are only given as numeric vectors.

      gp: An object of class 'gpar', typically the output from a call
          to the function 'gpar'.  This is basically a list of
          graphical parameter settings.

    draw: A logical value indicating whether graphics output should be
          produced.

      vp: A Grid viewport object (or NULL).

_D_e_t_a_i_l_s:

     The radius may be given in any units;  if the units are _relative_
     (e.g., '"npc"' or '"native"') then the radius will be different
     depending on whether it is interpreted as a width or as a height. 
     In such cases, the smaller of these two values will be the result.
      To see the effect, type 'grid.circle()' and adjust the size of
     the window.

     The '"grob"' object contains an object of class '"circle"'.

_V_a_l_u_e:

     An object of class '"grob"'.

_A_u_t_h_o_r(_s):

     Paul Murrell

_S_e_e _A_l_s_o:

     Grid, 'viewport'

